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Originally Posted by sudden urge
Some people have no clue what drone is, so they report that they have none. The louder the system is raises the drone level proportionally.
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So my Corvette with a cam and pipes didn't have any drone either?
Drone: The exhaust vibration that travels through the body of the vehicle at certain harmonics creating an annoying hum that can be heard inside the vehicle. It varies with the RPM of the engine, and is most noticeable when the frequency of the exhaust matches the resonant frequency of the adjacent body panels of the vehicle.
You're correct in that EVERY exhaust system has drone. The level can vary from "I can't hear it over the rest of the road noise" to "I can't hear a damn thing you're saying". and everything in between.